reinstalled . . .

[Not_Famous]

Not the OptionsEditor in the EQ folder. The icon on the desktop itself. Try;
1:Right Click on the Icon
2:Click on Properties
3:Click on Compatibility
3:Check "Run in 640 x 480 screen resolution"
4:Apply the setting and try it.
On the other computer, I changed resolution in OptionsEditor and didn't work either. but forcing 640x480 made it work.